Ultrahigh energy storage in superparaelectric relaxor ferroelectrics

🤖 Plain-English Summary

Electrostatic energy storage technology based on dielectrics is fundamental to advanced electronics and high-power electrical systems. We achieve an ultrahigh energy density of 152 joules per cubic centimeter with markedly improved efficiency (>90% at an electric field of 3.5 megavolts per centimeter) in superparaelectric samarium-doped bismuth ferrite–barium titanate films.

🔑 Key Findings

• Recently, relaxor ferroelectrics characterized by nanodomains have shown great promise as dielectrics with high energy density and high efficiency.
• We demonstrate substantial enhancements of energy storage properties in relaxor ferroelectric films with a superparaelectric design.
• The nanodomains are scaled down to polar clusters of several unit cells so that polarization switching hysteresis is nearly eliminated while relatively high polarization is maintained.

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